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2004 mercury 25 hp (20jet) power head interchange

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Bossmann

New member
Hey guys,
I have a 2004 2 stroke mercury 25 hp (20jet) with a blown engine that is seized solid.
Im wondering what year 25hp power head would fit. I do have access to a 87 mariner.

any advise would be greatly appreciated.

thanks in advance!
 
I believe the 87 will fit if you get the complete powerhead. You need the carb,ignition and all linkages. Double check the base gasket and driveshaft splines. Your block is a Mercosil motor so finding one of those would be your best bet.
 
Last edited:
So here is an update. (i like posts with conclusions)

I had a look at a 87 mariner and the block was not a mercosil so i opted to keep looking.
Although the blocks seemed to be similar the controls are quite different as you mentioned.

the next option i have is:

On my 2004 mercury jet 20/25.
Will that jet leg bolt on to any other motor than a 25?
(maybe i should start a new thread on this)
 
Bossmann said:
So here is an update. (i like posts with conclusions)

I had a look at a 87 mariner and the block was not a mercosil so i opted to keep looking.
Although the blocks seemed to be similar the controls are quite different as you mentioned.

the next option i have is:

On my 2004 mercury jet 20/25.
Will that jet leg bolt on to any other motor than a 25?
(maybe i should start a new thread on this)
Click to expand...
That leg should bolt on to the 87 motor. Just check the driveshaft splines but I am pretty sure they are the same.
 
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